calculate the difference of the square using the following formula a^2-b^2=(a+b) (a-b)

Question

1)28^2-12^2

Answer 1

Compare 28^2 - 12^2 with a^2 - b^2. 28 = a, and 12 = b.

use those values in (a+b)(a-b) to find the difference of the two squares.